Car-truck bolster.



PATENTED MAY 21, 1907.

G. A. JOHNSON.

GAR TRUCK BOLSTER. APPLICATION FILED JAN. 14, 1907.

ATTEJRNEY v BY.

WITNESSES! ms uomws PFTERS cm, WASHINGTON a. c.

UNITED STATES PATENT OFFICE.

GEORGE A. JOHNSON, OF PATERSON, NEW JERSEY, ASSIGN OR TO BENJAMIN A. IIEGEMAN, JR, OF NORTH PLAIN FIELD, NEWV JERSEY.

CAR-TRUCK BOLSTER.

Specification of Letters Patent.

Patented May 21, 1907.

Application filed January 14, 1907. Serial No. 352,129.

To (11 1077/0111, it may concern Be it known that I, GEoRe-n A. JOHNSON, a citizen of the United States, and a resident of Paterson, in the county of Passaic and State of New Jersey, have invented certain new and useful Improvements in Car-Truck Bolsters, of which the following is a specification.

The invention relates to improvements in car-truck bolsters, and consists in the novel features, arrangements and combinations of parts hereinafter described, and particularly pointed out in the claims.

The object of the invention is to produce a new and advantageous construction of bolster comprising a lower trough-shaped or bathtub member and an upper integral trough-shaped member set upright within the upper edges of the sides of the lower member and riveted thereto, said upper member having outwardly flanged upper edges and a top plate secured thereto, my purpose being to produce a highly efficient bolster capable of ready manufacture and possessing great strength and rigidity and designed to meet all of the conditions which may be imposed upon it in service.

The invention will be fully understood from the detailed description hereinafter pre sented, reference being had to the accompanying drawings, in which:

Figure 1 is a side elevation of a bolster constructed in accordance with and embodying my invention; Fig. 2 is a vertical transverse section of the same on the dotted line 2-2 of Fig. 1; Fig. 3 is an end elevation of the same, the side bearing being omitted, and Figs. 4 and 5 are detailed views indicating, in vertical transverse section, certain modifications in the construction of the bolster.

In the drawings, 10 designates the lower trough-shaped or bath-tub member, 11 the upper trough-shaped member, 12 the top plate riveted to the upper edge flanges of said upper member and connecting the sides of the latter, and 13 a center bearing of usual construction.

The lower member 10 comprises in one in tegral piece of steel the bottom 14 and sides 15, and the upper member 11 comprises a bottom 16 and vertical sides 17 and, unlike the lower member, is preferably of uniform depth from end to end. The upper edges of the sides of the upper member 11 are flanged l outwardly, as at 18, and upon these flanges is applied and rigidly secured the top plate 12, which is of usual construction and -receives the center-bearing13 and customary side-bearings 19.

The lower portion of the upper troughmember 1]. is set within the sides of the member 10 and riveted thereto, the rivets, numbered 20, passing transversely through the upper portions of the sides of the lower member and the lower portions of the sides of the upper member, as shown.

The sides of the lower member 10 extend from end to end of the bolster and engage the full length of the sides of the upper member 11. The lower member 10 is deepest at its center, and the end portions of said member are horizontal and furnish flat bottoms and Vertical sides to engage the flat bottom and vertical sides of the ends of the upper member 11.

Upon the opposite vertical'sides of the end portions of the bolster are secured suitable guides 21 of usual construction and operation.

The essential features of my invention comprise the lower trough-shaped member and integral upper trough-shaped member, the latter being set upright between the sides of the lower member and securely riveted thereto, and the bolster of my invention may not only be very readily manufactured but possesses great lateral as well as vertical stiffness.

In Figs. 4 and 5 I illustrate in vertical transverse section certain modified construc tions of the bolster, Fig. 4 being presented to show that the lower side portions of the upper member 11 may be sunken inwardly to receive the upper side portions of the lower member 10, whereby the sides of the bolster may have substantially flat outer vertical surfaces; and in Fig. 5 it is shown that the upper portions of the sides of the lower member 10 may be formed with outwardly extending flanges 22,thereby securing increased strength and stiffness when desired.

What I claim as my invention and desire to secure by Letters Patent, is

1. A bolster comprising a lower troughshaped. member, an upper integral trough shaped member set upright between thesides of said lower member and secured thereto, and a top-plate secured upon said upper member; substantially as set forth.

2. A bolster comprising a lower troughshaped member, having horizontal end portions and deeper middle portions, an upper integral trough-shaped member set upright between the sides of said lower member and secured thereto and at its end portions being seated upon the bottom of said horizontal end portions of said lower member, and a top-plate secured upon said upper member; su stantially as set forth.

3. A bolster comprising a lower troughplate secured upon said 20 

